this is a very detail subject but im asking simple question

We can see  even toed ungulates Artiodactyla    Odd-toed ungulates   Perissodactyla  diversity varies in continents  and some please like Madagascar   Australia and don't  have any native. south america don't have any bovids native and bovid diversity is very low north america. Africa has no  Tylopoda  Cervidae only found on north tip.  but very high bovid diversity. 

Eurasia has  both bovid Cervidae diversity.

Please describe what factors causes this uneven distribution   

 

10 minutes ago, faslan said:

 this is a very detail subject but im asking simple question

We can see  even toed ungulates Artiodactyla    Odd-toed ungulates   Perissodactyla  diversity varies in continents  and some please like Madagascar   Australia and don't  have any native. south america don't have any bovids native and bovid diversity is very low north america. Africa has no  Tylopoda  Cervidae only found on north tip.  but very high bovid diversity. 

Eurasia has  both bovid Cervidae diversity.

Please describe what factors causes this uneven distribution   

 

Evolution and continental drift, I imagine.